Bascule-bridge.



Patented Feb. 16, 1915.

2 SHEETSSHEET 1.

IIIIIIII O. MCKIBBBN.

BASGULE BRIDGE.

APPLlGA'I'ION FILED JAN.6. 1914.

C. MGKIBBEN.

`BASCULE BRIDGE.

APPLIQATIoN FILED JAN. s, 1914.

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Patented Feb. 16, 1915.

2 SHEETS-SHEET 2 .s2-iff: '.,I- 7' /(Ze/Q w13 mgm @vH/nemo r/ gc'c ,f

` iit To all whom 'it may concern 'Be itfknown that L Convenios liolinesn, a Aditizen'of the Unit-ed States, residing at Aransas Pass,l in the county ot .Son atricio 5 and Sta-te of Tesasi have 'invented new and useful improvements in Emaille-Bridges of which the following is a speen@cation.`

This invention relates to improvements in draw bridges, especially 'bridges of the i@ rocking bascule type in which the movable draw or span is provided at one end with a segmental part adapted to rest and roll upon a stationery supporting surface and in' which the segmental pivoting part is 1g rovided 'with a. oounter Weight, spaced the inner edge of the draw or span and employed to counter balones the same and hence iacilitate the raising and lowering oi the risas* the oliieot of the invention go seing to eleot an iinpmvenient in bridges oi' this t ie oy profvidir" sliitaole weight tporting g tiiereon which and n en guide arran'ed in the sngle between the counter balancing weight and the inner end as of the draw span and which serves to direct the shiftble weight aei'oss the pivotal centex.' of the span the weight being actuated by own gravity and controlli d oy the movement of the vn so that the said shift se aole Weight is assist materially @oth in the .afi' lowering of' 'the consisting in. the and arrangement rilzed and claimed. 1* vv ii :-li"ig\.ire portion. olf tie fe span 1n open improved -ation is a tren; v v un tile piane indioated by the 'line of Fig. l, end showing the draw span, poorts and operating meolianisin in er eievation. Fig. .fi a detail vertical limfvitudin'il sectional View through the ri of one oia the suppoiting guides. Filet. i is a detail perspective view of one of .5@ the supporting fi des.

The shorewam eno of the indicated at l.y the pivoting segments at 3 t'nrsupports on which the said pivoting segments roll are indicated at on the 55 piers l and the. counter balancing weights 'are indicated at 5. The said supporting bridge span is exited Tieio. id, i335.

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segments are interposed between the inner end of the draw soon and the counter balancingweigiits ano, are provided with oars o wi. l' at right angles to the center radii oi' the supporting segments. The draw span is raised and. lowered by gears 7 which are driven by soitabie motors 8 and engage intorioiiy toothed segmental members 9 which are concentric with the pivotal axes of the supporting, pivoting and rollingse ments Z said pivotal axes being indica-til in accordance with my invention I rovide supporting guides 11 which are ere shown tubular in form and which are Secured on the oars 5 and extend from the shoreward end of the draw span to the wei r'nts 'lfne ends of the said supporti!! gaines are closed as at l2 and are provide with ousliions or bumpers 13. 'in each sugporting goide a spherical weight 14 1s mounted for longitudinal movement the said weights being movableby their own gravity and by the rocking movement of the draw span from end to end of the said supporting guides. Hence when the draw span is in closed, lowered position, the weights 14 are at the ends of the suppolting guides next 'the draw span and add their Weight to the latter. the draw span is raised, the weights i4, as soon as the span has been moved through about 450 and the supportguides l1 reaching a substantially level position begin to move from the ends of the supporting guides next to the draw span and reaoli a position substantially at the pivotal axes of the rocking supports 2 and as the draw span continues to rise the said weights 14 move outwardly on the supporting guides ll and reach the ends thereoil next'the counter balancing weights 5 and hence materially assist in the final elevating movement of the draw span, When the draw span is lowered the weights 14 move toward the same hence materially assist in the final lowering movement thereof, the said weights 14: being movable across the pivotal axis of the draw span.

Under some conditions, as for instance when the wind is blowing in such direction as to materially assist in the lifting of the draw span it is desirable to prevent the weights 14 from moving past the 'pivotal of the draw span and to enable the Weights to be thus arrested i, provide stone which are here show@ fi s that the scope of the appended claims.

Having thus described my invention, I claim 1. In a. bascule bridge a draw span, a rolling support therefor at the shoreward end of the span, a counter balancing Weight for the draw span and arranged on the shoreward side of the rolling Support and at an angle to the said span, a supporting guide arranged in the angle between the counter balancing Aveigbt and the draw span and a movable weight in said supporting guide.

2. In a bascule bridge a. draw span, a rolling support therefor' at the shoreward end of the span, a counter balancing weight for the draw span and arranged on the shore- Ward side of the rolling support and at an angle to the said span, a supporting guide arranged in the angle between the counter balancing weight and the draw span and extending from the weight in said supporting guide, the said supporting guide being tubular and a. spherical movable weight arranged for movement in tbe bore of the said supporting guide.

In a bascule bridge a dran' span, a rolling support therefor at the shoreward end of the span, a counter balancing weight for the draw span and arranged on the shoreward side of the rolling support and at an angle to the said span, a supporting guide arranged in the angle between the counter balancing weight and the draw span, a movable weight in said supporting guide7 and buffers at the ends of the said supporting guide.

l. In a bascule bridge a draw span, a rolling support therefor at the shoreward end of the span, a counter balancing Weight for the draw span and arranged on the shoreward side of the rolling support and at an angle to the Said span, a supporting guide arranged in the angle between the counter balancing weight and the draw span, a mov able weight in said supporting guide, and means to limit tbe extent of movement of the said movable weight..

In testimony wbereol" I afliX my signature in presence of two witnesses.

(OLUM BUS MCI( IBBEN. lVitnesses:

JOHN Donomss, CONN BROWN. 

